Analysis on Gravel Fabric of the Late Cretaceous to the Paleocene Lianhe Formation in Fuzhou-Chongren Basin, Jiangxi
详细信息
- 责任者：Liang Wei (College of Earth Sciences ; East China Institute of Technology ; Nanchang 330013 ; China) ; Chen Liuqin
- 刊名：Journal of Geomechanics
- 出版年：2013
- 卷期：19(1)
- 关键词：砾石 ; gravel ; 盆地演化 ; basin evolution ; 江西 ; Jiangxi Province
- 页码：p.35-44
- 图表：illus., 5 tables, 20 refs.
- 分类号：0803
- issnNo：ISSN1006-6616
- isbnNo：CN11-3672/P
摘要
Analyzing the gravel fabric of red layers of the Cenozoic in Ganhang tectonic belt is helpful to understand the formation and evolution of the red basin.Using analysis method to study the composition,particle size,shape and preferred orientations of conglomerate layers of the Late Cretaceous to the Paleocene Lianhe Formation in Fuzhou-Chongren basin.The study can estimate the source,origin and formation conditions of these gravels.The result shows that the gravels of the Late Cretaceous to the Paleocene Lianhe Formation were the products of alluvial fan facies in semiarid to arid climate condition.The gravel deposits are featured by multi-source and rapid accumulation,poor sorting,subangular to subrounded and low degree of weathering.The composition assemblages of gravels of different areas in the basin are obviously different,which reflects complex provenance condition around the basin.Based on the bed rock strata characteristics and the rose diagrams from the planes of maximum flat(ab-planes) of gravals,the sediment source was mainly from northern,northwestern and western parts of the basin.